The relative distances between the particles of a body A is fixed and does not change. Which of the following statements about the body is wrong?
The body undergoes negligible deformation.
The body is perfectly rigid
A force acting on the body does not change its structure
The correct option is D Body is elastic.
The relative distances between the particles of a body A is fixed. This means that the particles of the body move together as a unit while for an elastic body, distance between the particles changes when force acts on it.